correct mergify config #1137

Job	Run time
test-bzlmod-internal-erlang	32s
test-bzlmod (25.3)	2m 28s
test-bzlmod-coverage	2m 38s
test-bzlmod (26.2)	2m 23s
test (25.3)	2m 30s
test (26.2)	2m 32s
test-bzlmod-macos	2m 4s
test-bzlmod-windows (25.3)	4m 23s
test-host-erlang-change-detected	23s
unit-test-bzlmod (25.3)	44s
unit-test (25.3)	25s
unit-test-bzlmod (26.2)	29s
unit-test (26.2)	22s
summary	0s
	21m 53s

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